土壤垂直和水平复合载荷-变形关系研究

发布时间：2018-03-07 16:25

  本文选题：土壤　切入点：垂直载荷　出处：《农业机械学报》2017年09期 　论文类型：期刊论文

【摘要】：基于有限元理论分析了土壤在承受垂直和水平复合载荷下的变形规律。首先通过平板沉陷试验分析确定土壤在垂直载荷作用下的载荷-变形关系,接着考虑水平载荷的影响,通过剪切试验确定土壤的复合载荷-变形关系。研究结果表明,水平载荷会造成土壤的滑动沉陷,水平剪切位移与土壤的滑动沉陷量之间呈线性关系。对影响滑动沉陷量的因素进行了分析,其中影响比较大的因素是垂直方向的载荷以及土壤的塑性参数:黏聚力和摩擦角,而土壤的弹性参数:弹性模量和泊松比对滑动沉陷量的影响比较小。
[Abstract]:Based on the finite element theory, the deformation law of soil under vertical and horizontal composite loads is analyzed. Firstly, the load-deformation relationship of soil under vertical load is determined by plate subsidence test, and then the influence of horizontal load is considered. The composite load-deformation relationship of the soil is determined by shear test. The results show that the horizontal load will result in the sliding subsidence of the soil. There is a linear relationship between horizontal shear displacement and the amount of sliding subsidence in soil. The factors influencing the amount of sliding subsidence are analyzed. The factors that influence the amount of sliding subsidence are the load in vertical direction and the plastic parameters of soil: cohesion force and friction angle. But the elastic parameters of soil: elastic modulus and Poisson ratio have little effect on slip settlement.
【作者单位】： 军械工程学院火炮工程系;
【基金】：军内重点科研项目(404040602)
【分类号】：TU433
，

本文编号：1580042